Sorry if the answer is right under my nose, but I am looking for documentation on the various js files in the root folder. I have come to understand bootstrap.js, and I often use ext-all-debug.js during development. However, I have found that ext-debug.js is not comparible to the src/debug.js in V3 (I miss the console that it created.) What is ext-dev.js? ext-all-dev.js vs ext-all-debug.js, etc? I have found hints a bits on the forum, but would like to see a technical description of the intention and purpose of each of these files. Also, if there is a way to get the debug console functionality in IE (including IE6) that was provided by src/debug.js, I would appreciate that as a secondary question.

I have searched the forums, blogs, and readme / welcome / doc system and cannot find the intent and purpose of these separate files.

ext-all and ext-all-debug are functionally equivalent, whereas ext-all-dev throws console warnings when you do things like use deprecated APIs or misconfigure components. I don't believe we have ported the debug console from 3.x across yet

You need to set path for Ext when you use ext-dev.js . I think you should always use ext-dev.js instead of ext-debug.js when you intend to use dynamic class loading feature during your development phase.

ext-all and ext-all-debug are functionally equivalent, whereas ext-all-dev throws console warnings when you do things like use deprecated APIs or misconfigure components. I don't believe we have ported the debug console from 3.x across yet